While the cube is a wonderful shape, and tessellates 3D space beautifully, it seems a bit boring as a shape for ice to put in your drink. With this π Ice Cube Tray, you can freeze some H2O in the shape of the amazing circle constant, π (other circle constants are available) and wow your party guests with mathematical mojitos and π-na coladas. Each tray allows you to make 12π.
You can also use this mould to set other substances into the shape of a π symbol, such as chocolate, juice/smoothies (to make π-shaped ice lollies), or you can even make mathematical jelly or sweets. Irrational!
Price = p168 pence = £9.97